The Dinan Valved Axle-Back Exhaust is fabricated from 100% brushed, TIG-welded T304 stainless steel and installs at the factory cut points and mounts for OE-precise fitment. It replaces the stock dual slash-cut 90mm (3.5in) tips with massive straight-cut 102mm (4in) double-walled, black ceramic-coated, laser-engraved tips for an unmistakable rear look and a deep growl atypical of the base 4-cylinder turbo platform. Factory valve control is retained, and Dinan's drone-abatement design keeps the cabin composed. The system adds up to +4 HP and +3 lb-ft and installs bolt-on with the included mounting hardware.
Specifications
| Type | Valved axle-back exhaust |
| Material | T304 stainless steel, TIG welded, brushed |
| Tips | Dual 4in (102mm) straight-cut, double-walled, laser-engraved |
| Finish | Black ceramic-coated tips |
| Valves | Retains factory valve control |
| Power Gain | +4 HP & +3 lb-ft |
| Part Number | D660-0091-BLK |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2019-2024 | BMW | 330i | Base |
| 2019-2024 | BMW | 330i xDrive | Base |
| 2021-2024 | BMW | 430i | Base |
| 2021-2024 | BMW | 430i xDrive | Base |
Shipping
- Orders placed before 3 PM ET typically ship the same business day. Larger items ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty
